cac digital signature

Information Digest, digital signatureAccording to the article, the asymmetric key algorithm is:http://blog.csdn.net/u014419512/article/details/26290821Now we are able to continue our scene:If one day. Alice received a copy of the signature Bob the file. Alice wished to confirm that the document must have come from Bob, and Alice wished to be sure. The document was not tampered with in the course of its tra

the data must be decrypted with another key.) ), get a summary of the text, and then use the same hash algorithm as the sender to calculate the digest value, and then compare with the decrypted summary, found that the two are exactly the same, the text has not been tampered with.In fact, the two concepts of encryption, decryption and digital signature are introduced, and the process of implementation is ex

Encryption and decryption use the same key algorithm, called symmetric encryption algorithm. encryption and decryption use different keys, called asymmetric encryption algorithms. The public key system is an asymmetric encryption algorithm. For symmetric encryption, symmetric keys must be protected. For public key algorithms, private keys must be protected.Public key encryption algorithms and derived digital signatures and

Reference to this blog: Introduction to RSA encryption algorithm basic knowledge of digital signature 1. Digital signatures and data encryption are required to use the RSA and other asymmetric encryption algorithm Where the digital signature is the sender with the priv

This article mainly discusses cryptography and digital signature, and how it is used in Java. The partner who is interested in cryptography is recommended to see Bruce Schneier's book: Applied Crypotography. There has been a great improvement in security in the release of jdk1.5, as well as direct support for RSA algorithms, and now we're going to solve the problem from the example (this article is just a b

Public key* @param data encryption* @param key key* @return* @throws Exception*/public static byte[] Decryptbypublickey (byte[] data,string key) throws exception{Decrypt the private keybyte[] keybytes = decryptBASE64 (key);X509encodedkeyspec X509encodedkeyspec = new X509encodedkeyspec (keybytes);Keyfactory keyfactory = keyfactory.getinstance (key_algorthm);Key PublicKey = Keyfactory.generatepublic (X509encodedkeyspec);Decryption of dataCipher Cipher = cipher.getinstance (Keyfactory.getalgorithm

Shore Yang Xiping This paper introduces the application of digital signature technology in E-government, the traditional digital signature technology is based on asymmetric cryptographic algorithm, the original text is transmitted in clear text, in this way, the security of the original text is greatly threatened, the

I. Overview 1, the digital Signature algorithm can be regarded as a message digest algorithm with a key, and this key includes the public and private keys. He's a combination of asymmetric encryption algorithms and message digest algorithms. 2, the digital Signature algorithm is the public Key Infrastructure (PKI), as

(decrypt)); } } The DSA algorithm and digital signature DSA are typically used for digital signatures and authentication. The DSA is a variant of the Schnorr and ElGamal signature algorithm, which was used as a DSS (DigitalSignature Standard) by the United States NIST. The DSA is based on the integer finit

In the daily work, there are many documents need to lead the review, signature and seal, as the company's business development, Cross-border, cross-border business is increasingly common, the leadership signature seal became very troublesome, the beginning of people by mail, fax and other means to solve, but time-consuming, human and material resources. Increasingly deep in the network today, the need for l

Paperless Signature Overview In this chapter, we will study digital signatures, which are the first level to determine the identity of the contact who exchanges messages. We will use code samples to describe the two methods used to identify the message source (one is more difficult and the other is easier ). We will also list the digital

This article mainly explains the contents of the APK digital signature, and introduces the way of the APK debug mode and the digital signature in the release mode. This article transferred from: http://www.jizhuomi.com/android/environment/293.html 1. What is a digital

Do you know what is the use of Word digital signature ? Do you use Word digital signatures to protect your documents? Today I learn to worry about the content of Word digital signature. One, what is "digital

If you pass a data on the Internet, but there are all sorts of unsafe factors that make you wonder whether the data will arrive at your destination intact, and you can digitally sign the data so that the other person can verify that your data has been modified by verifying the signature. First, the principle of procedure The principle of digital signature is re

intercepted or accessed by anyone other than the recipient. By using Outlook Express's "Digital logo", you can prove your identity in electronic transactions, just as if you had to present a valid credential when paying a check. You can also use digital identifiers to encrypt messages to protect your privacy. The digital logo is combined with the S/MIME specific

1. What is a digital signature? A digital signature is used to mark your program as your own identity. When someone else sees the signature, they will know that it is related to you. 2. Why do I need a digital

This article mainly talks about encryption and digital signature in cryptography, and how to use it in java. For partners interested in cryptography, we recommend that you read Bruce Schneier's book: Applied Crypotography. Security has been greatly improved in the jdk1.5 release, and direct support for the RSA algorithm is also provided. Now we start with an example to solve the problem (this article is onl

Introduction: When it comes to signatures, everyone is familiar with it. As we all know, signatures are generally required for major files to ensure their authenticity and effectiveness. Some important contracts, such as the house purchase contract, must be stamped with the "Seam seal". This seam seal is the seal stamped in the middle of two pages, which also represents the signature, it is used to guarantee the integrity of your contract. Therefore,

The internet is a lot of fake phenomenon, this is not in the author's computer, Trojan disguised as a normal security document, staged a "true Monkey King" farce. If you have the same situation at this time, may wish to follow the author to use digital signature technology, to find out the evil disguise Trojan Horse "." Small knowledge: Simply called digital

To ensure the integrity of the document, prevent the document from being tampered with, and ensure the source of the document, the Open XML provides support for digitally signing the document. The ability to capture digital signatures by using signature lines in Office documents enables organizations to use paperless signing processes for documents such as contracts or other agreements. Unlike paper signatu